Description

A flaw was found in Keycloak. When the configuration uses JWT tokens for authentication, the tokens are cached until expiration. If a client uses JWT tokens with an excessively long expiration time, for example, 24 or 48 hours, the cache can grow indefinitely, leading to an OutOfMemoryError. This issue could result in a denial of service condition, preventing legitimate users from accessing the system.

INFO

Published Date :

2025-03-25T08:20:57.666Z

Last Modified :

2026-05-06T16:48:50.818Z

Source :

redhat
AFFECTED PRODUCTS

The following products are affected by CVE-2025-2559 vulnerability.

Vendors Products
Redhat
  • Build Keycloak
  • Red Hat Single Sign On
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-2559.

URL Resource
https://access.redhat.com/errata/RHSA-2025:4335 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2025:4336 cve-icon cve-icon
https://access.redhat.com/security/cve/CVE-2025-2559 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2353868 cve-icon cve-icon
https://github.com/keycloak/keycloak/commit/a10c8119d4452b866b90a9019b2cc159919276ca cve-icon cve-icon
https://github.com/keycloak/keycloak/issues/38576 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-2559 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-2559 cve-icon
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